Doping Effect of Sr2+ on Electrical Conductivity in La1−xSrxSc1−yAlyO3 Perovskite-type Oxides

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概要

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• The total electrical conductivities of Sr2+ and Al3+-doped LaScO3 materials, La1−xSrxSc1−yAlyO3 (x=0.1–0.325, y=0–0.01), were examined under wet, dry, reduced and oxidized conditions and were found to express mixed ionic and electronic conductivities. In the high temperature range of 1073 to 1273 K, oxide-ion conduction was predominant. In the systematic measurement of electrical conductivity, we found that the oxide-ion conductivities and activation energies show continuous changes over a wide range of Sr2+ dopant concentrations. We also found that oxide-ion conduction was enhanced by Sr2+ doping to the La3+ site. The ionic transference number, tion, calculated from the conductivity data under high and low P (O2) conditions was 0.73 (x=0.325, y=0.01) at 1273 K.

• 公益社団法人 電気化学会の論文

著者

• YUGAMI Hiroo

  Graduate School of Engineering, Tohoku University

• KATO Hisashi

  Tohoku Electric Power Co., Inc.

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• Doping Effect of Sr2+ on Electrical Conductivity in La1−xSrxSc1−yAlyO3 Perovskite-type Oxides

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